We present the first unambiguous evidence of the interfacial mechanism of phase‐transfer catalysis (PTC) by direct observation of the formation of carbanions in the interfacial region between the aqueous and the organic phase by using a surface‐sensitive spectroscopic method known as second harmonic generation (SHG). Ion exchange of carbanions adsorbed at the surface after addition of lipophilic tetraalkylammonium salts (TAA) to organic phase and transport of the lipophilic ion‐pairs to the organic phase is observed. Results allow for the formulation of a more detailed mechanism of PTC.
Chemistry - A European Journal – Wiley
Published: Jan 15, 2018
Keywords: ; ; ; ;
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